74FST3400QSR

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Logic - Signal Switches, Multiplexers, Decoders are widely used in a variety of industry applications. The 74FST3400QSR is an integrated device used for basic switching and signal steering operations. It functions as a high-speed multiplexer, decoder, demultiplexer, or latch/memory device. The 74FST3400QSR is an improved version of previous 74FST3000QSR logic devices with an increase in peripheral power supply capability. As such, it is a suitable suite for many commercial, initial and military applications.

Application Field

The 74FST3400QSR is an integrated device used for routing, multiplexing and demultiplexing high-speed signals in different communication and industrial applications. Due to its high switching speed, this integrated device is suitable for data transfers among computers, networks, and communication systems. Moreover, due to its easy interface and operation, it can also be used as a latching device, as a single-pole switch, and as a decoder in multiple power systems. As such, it is widely used in consumer electronics (televisions, cellular phones, etc), automotive industry, and aerospace industry.

Working Principle

The 74FST3400QSR provides several transistors in a single package for controlling basic switching and signal routing operations. It contains a switch array of up to sixteen 2-bit or four 4-bit multiplexers which are best suited for data transfers requiring high switching speed with low fanout. The device operates in two extreme settings, logic high(1) or logic low(0). According to the value of the control signal, the device switches the output line to either extreme value.

To achieve the desired output, the control port aids in the interpretation of the input signals. This port carries the switching instructions which are converted through an internal decoder. The decoder maps the values of the control port to the corresponding output terminal by activating the transistors. Depending on the mode of operation, the transistors activate either the output (for data transfer) or the control line (to make latching operations). This action is repeated until all the output channels are filled with the control instruction.

Finally, when the last instruction is delivered, the output line connected to the control port is activated and the data is stored in the input channel. This data can then be readout whenever needed, thereby making the device a non-volatile or latching device.

Conclusion

The 74FST3400QSR is a high-speed integrated device with a wide array of applications. It functions as a multiplexer, demultiplexer, or a latching device. In addition, it has improved peripheral power supply capability which makes it suitable for a variety of commercial and military applications. This device is also known for its easy interface and operation. With the help of its internal decoder and data transfers require high switching speed and low fanout.

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